This study deals with forecasting economic time series that have strong trends and seasonal patterns. How to best model and forecast these patterns has been a long-standing issue of time series analysis. In this work, we propose a Holt-Winters Exponential Smoothing approach to time series forecasting in order to increase the chance of capturing different patterns in the data and thus improve forecasting performance. Therefore, the main propose of this study is to compare the accuracy of Holt-Winters models (additive and multiplicative) for forecasting and to bring new insights about the methods used via this approach. These methods are chosen because of their ability to model trend and seasonal fluctuations present in economic data. The models are fitted to time series of e-commerce retail sales in Portugal. Finally, a comparison is made and discussed.
{"title":"Time series forecasting using Holt-Winters exponential smoothing: An application to economic data","authors":"S. Lima, A. Gonçalves, M. Costa","doi":"10.1063/1.5137999","DOIUrl":"https://doi.org/10.1063/1.5137999","url":null,"abstract":"This study deals with forecasting economic time series that have strong trends and seasonal patterns. How to best model and forecast these patterns has been a long-standing issue of time series analysis. In this work, we propose a Holt-Winters Exponential Smoothing approach to time series forecasting in order to increase the chance of capturing different patterns in the data and thus improve forecasting performance. Therefore, the main propose of this study is to compare the accuracy of Holt-Winters models (additive and multiplicative) for forecasting and to bring new insights about the methods used via this approach. These methods are chosen because of their ability to model trend and seasonal fluctuations present in economic data. The models are fitted to time series of e-commerce retail sales in Portugal. Finally, a comparison is made and discussed.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"123 11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88530486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
L. Morais, A. Argondizzo, Dílson Silva, S. Missailidis
Zika virus (ZIKV) belongs to the Flaviviridae family and its recent outbreak and association with human diseases (e.g. neurological disorders and microcephaly in babies) have raised global health concerns. Its differentiation from Dengue in accurate diagnostic assays are of great importance. The viral NS1 protein is a secreted protein and can be an ideal target for diagnostic assay development. We have thus selected NS1 as target for aptamer selection and study. Single-stranded DNA oligonucleotides aptamers have been previously selected for this target, and here we present the study of such aptamers by fluorescent spectroscopy, CD and ELISA in order to characterize their interaction and select the best candidate for further future assay development.Zika virus (ZIKV) belongs to the Flaviviridae family and its recent outbreak and association with human diseases (e.g. neurological disorders and microcephaly in babies) have raised global health concerns. Its differentiation from Dengue in accurate diagnostic assays are of great importance. The viral NS1 protein is a secreted protein and can be an ideal target for diagnostic assay development. We have thus selected NS1 as target for aptamer selection and study. Single-stranded DNA oligonucleotides aptamers have been previously selected for this target, and here we present the study of such aptamers by fluorescent spectroscopy, CD and ELISA in order to characterize their interaction and select the best candidate for further future assay development.
{"title":"Aptamers against the Zika virus NS1 protein, for a serological diagnostic assay development","authors":"L. Morais, A. Argondizzo, Dílson Silva, S. Missailidis","doi":"10.1063/1.5138061","DOIUrl":"https://doi.org/10.1063/1.5138061","url":null,"abstract":"Zika virus (ZIKV) belongs to the Flaviviridae family and its recent outbreak and association with human diseases (e.g. neurological disorders and microcephaly in babies) have raised global health concerns. Its differentiation from Dengue in accurate diagnostic assays are of great importance. The viral NS1 protein is a secreted protein and can be an ideal target for diagnostic assay development. We have thus selected NS1 as target for aptamer selection and study. Single-stranded DNA oligonucleotides aptamers have been previously selected for this target, and here we present the study of such aptamers by fluorescent spectroscopy, CD and ELISA in order to characterize their interaction and select the best candidate for further future assay development.Zika virus (ZIKV) belongs to the Flaviviridae family and its recent outbreak and association with human diseases (e.g. neurological disorders and microcephaly in babies) have raised global health concerns. Its differentiation from Dengue in accurate diagnostic assays are of great importance. The viral NS1 protein is a secreted protein and can be an ideal target for diagnostic assay development. We have thus selected NS1 as target for aptamer selection and study. Single-stranded DNA oligonucleotides aptamers have been previously selected for this target, and here we present the study of such aptamers by fluorescent spectroscopy, CD and ELISA in order to characterize their interaction and select the best candidate for further future assay development.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"46 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75026080","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
J. Shim, Y. Yu, D. Tartakovsky, H. Piao, Sang-Hyuk Lee, D. Kim, Seong-cho Yu, Dong-Hyun Kim
We report our micromagnetic simulation investigation of the magnetic vortex core motion in a disk with an antidot. With variation of antidot geometry, faster core gyration is expected, where gyrotropic motion near antidots becomes quite sensitively depending on the antidot geometry, with frequency up to several GHz. Our finding opens a possibility to boost up the core motion of a ferromagnetic nanostructure with introducing geometrical modulation.We report our micromagnetic simulation investigation of the magnetic vortex core motion in a disk with an antidot. With variation of antidot geometry, faster core gyration is expected, where gyrotropic motion near antidots becomes quite sensitively depending on the antidot geometry, with frequency up to several GHz. Our finding opens a possibility to boost up the core motion of a ferromagnetic nanostructure with introducing geometrical modulation.
{"title":"Micromagnetic simulation of fast GHz gyromotion of magnetic vortex core in Permalloy disk with antidot","authors":"J. Shim, Y. Yu, D. Tartakovsky, H. Piao, Sang-Hyuk Lee, D. Kim, Seong-cho Yu, Dong-Hyun Kim","doi":"10.1063/1.5138097","DOIUrl":"https://doi.org/10.1063/1.5138097","url":null,"abstract":"We report our micromagnetic simulation investigation of the magnetic vortex core motion in a disk with an antidot. With variation of antidot geometry, faster core gyration is expected, where gyrotropic motion near antidots becomes quite sensitively depending on the antidot geometry, with frequency up to several GHz. Our finding opens a possibility to boost up the core motion of a ferromagnetic nanostructure with introducing geometrical modulation.We report our micromagnetic simulation investigation of the magnetic vortex core motion in a disk with an antidot. With variation of antidot geometry, faster core gyration is expected, where gyrotropic motion near antidots becomes quite sensitively depending on the antidot geometry, with frequency up to several GHz. Our finding opens a possibility to boost up the core motion of a ferromagnetic nanostructure with introducing geometrical modulation.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"89 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77036364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A high rate of corporate bankruptcy can be devastating to economic and entrepreneurial ecosystem, especially among countries with a high concentration of Micro, Small and Medium Sized Enterprises (SMEs). Most bankruptcy studies focus on large companies, ignoring the fact that SMEs play a key role in achieving the objectives of job creation and economic growth, which are particularly relevant in the peripheral countries of the European Union. Considering the relevance of these companies to the Portuguese economy and the scarcity of empirical studies, in this paper we offer a preliminary study about the determinants of survival of SMEs operating in Portugal. Unlike to the traditional models (i.e., static models tending to ignore the longitudinal factor of time to predict corporate bankruptcy) this study applies the Cox proportional risk model in order to predict, based on historical data taken from SABI, the probability whether a SME will be in financial distress. Using data between 2008-18 and controlling for spatial effect (Region), Size and Activity Sector, we found evidences on the negative relation between ownership concentration and financial distress.
{"title":"Survival analysis of Portuguese SMEs: A preliminary approach","authors":"Ana Borges, M. Machado, F. Duarte","doi":"10.1063/1.5137998","DOIUrl":"https://doi.org/10.1063/1.5137998","url":null,"abstract":"A high rate of corporate bankruptcy can be devastating to economic and entrepreneurial ecosystem, especially among countries with a high concentration of Micro, Small and Medium Sized Enterprises (SMEs). Most bankruptcy studies focus on large companies, ignoring the fact that SMEs play a key role in achieving the objectives of job creation and economic growth, which are particularly relevant in the peripheral countries of the European Union. Considering the relevance of these companies to the Portuguese economy and the scarcity of empirical studies, in this paper we offer a preliminary study about the determinants of survival of SMEs operating in Portugal. Unlike to the traditional models (i.e., static models tending to ignore the longitudinal factor of time to predict corporate bankruptcy) this study applies the Cox proportional risk model in order to predict, based on historical data taken from SABI, the probability whether a SME will be in financial distress. Using data between 2008-18 and controlling for spatial effect (Region), Size and Activity Sector, we found evidences on the negative relation between ownership concentration and financial distress.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"5 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75244414","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The article focuses on Smart Building and its realization. The Smart Building uses Loxone for home control. The article aims to describe the house, describe the Loxone system and its components (hardware). Next show distribution point - the intelligence of the Smart Building. In conclusion, the article deals with other possibilities of expanding the intelligent house and its vision.The article focuses on Smart Building and its realization. The Smart Building uses Loxone for home control. The article aims to describe the house, describe the Loxone system and its components (hardware). Next show distribution point - the intelligence of the Smart Building. In conclusion, the article deals with other possibilities of expanding the intelligent house and its vision.
{"title":"Smart building with Loxone system","authors":"M. Žáček","doi":"10.1063/1.5137964","DOIUrl":"https://doi.org/10.1063/1.5137964","url":null,"abstract":"The article focuses on Smart Building and its realization. The Smart Building uses Loxone for home control. The article aims to describe the house, describe the Loxone system and its components (hardware). Next show distribution point - the intelligence of the Smart Building. In conclusion, the article deals with other possibilities of expanding the intelligent house and its vision.The article focuses on Smart Building and its realization. The Smart Building uses Loxone for home control. The article aims to describe the house, describe the Loxone system and its components (hardware). Next show distribution point - the intelligence of the Smart Building. In conclusion, the article deals with other possibilities of expanding the intelligent house and its vision.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"25 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75716158","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Tarasyev, G. Agarkov, T. V. Tarasyeva, J. B. Jabbar
Effective regulation of labor migration implies the need to predict the volume, structure and direction of migration. Model description and forecasting of migration processes is necessary to optimize the flow of labor resources between labor markets that arise as a result of new trends in migration and reform of society. Weak regulation of labor migration in the absence of a complete information base necessary for migrants to decide on the optimal choice of the region of destination of migration, leads to an increase in the share of labor migrants employed in the informal sector of the economy, which as a result reduces the potential of human capital in the regions. The analysis of migration processes shows the need to simulate the dynamics of migration flows, which allows to describe the trends in the redistribution of labor in the current period and to make forecasts for the short-term long-term perspective. In this regard, a number of existing types of models of population migration were considered and dynamic models of population migration were based on them. We developed a model tool based on a dynamic game model of labor migration, which determines the value of migration flows in the conditions of uneven distribution of income levels of the population in the regional labor markets. In accordance with the proposed model, migration flows tend primarily to regions with more attractive working conditions, in our case – to regions with higher wages. Based on the data obtained in the simulation, we can talk about a significant decrease in the average wage level in the sectors of the labor market occupied by migrants in the regions of attraction.Effective regulation of labor migration implies the need to predict the volume, structure and direction of migration. Model description and forecasting of migration processes is necessary to optimize the flow of labor resources between labor markets that arise as a result of new trends in migration and reform of society. Weak regulation of labor migration in the absence of a complete information base necessary for migrants to decide on the optimal choice of the region of destination of migration, leads to an increase in the share of labor migrants employed in the informal sector of the economy, which as a result reduces the potential of human capital in the regions. The analysis of migration processes shows the need to simulate the dynamics of migration flows, which allows to describe the trends in the redistribution of labor in the current period and to make forecasts for the short-term long-term perspective. In this regard, a number of existing types of models of population migration were considered and...
{"title":"Dynamic game model for finding the equilibrium level of migration flows","authors":"A. Tarasyev, G. Agarkov, T. V. Tarasyeva, J. B. Jabbar","doi":"10.1063/1.5137938","DOIUrl":"https://doi.org/10.1063/1.5137938","url":null,"abstract":"Effective regulation of labor migration implies the need to predict the volume, structure and direction of migration. Model description and forecasting of migration processes is necessary to optimize the flow of labor resources between labor markets that arise as a result of new trends in migration and reform of society. Weak regulation of labor migration in the absence of a complete information base necessary for migrants to decide on the optimal choice of the region of destination of migration, leads to an increase in the share of labor migrants employed in the informal sector of the economy, which as a result reduces the potential of human capital in the regions. The analysis of migration processes shows the need to simulate the dynamics of migration flows, which allows to describe the trends in the redistribution of labor in the current period and to make forecasts for the short-term long-term perspective. In this regard, a number of existing types of models of population migration were considered and dynamic models of population migration were based on them. We developed a model tool based on a dynamic game model of labor migration, which determines the value of migration flows in the conditions of uneven distribution of income levels of the population in the regional labor markets. In accordance with the proposed model, migration flows tend primarily to regions with more attractive working conditions, in our case – to regions with higher wages. Based on the data obtained in the simulation, we can talk about a significant decrease in the average wage level in the sectors of the labor market occupied by migrants in the regions of attraction.Effective regulation of labor migration implies the need to predict the volume, structure and direction of migration. Model description and forecasting of migration processes is necessary to optimize the flow of labor resources between labor markets that arise as a result of new trends in migration and reform of society. Weak regulation of labor migration in the absence of a complete information base necessary for migrants to decide on the optimal choice of the region of destination of migration, leads to an increase in the share of labor migrants employed in the informal sector of the economy, which as a result reduces the potential of human capital in the regions. The analysis of migration processes shows the need to simulate the dynamics of migration flows, which allows to describe the trends in the redistribution of labor in the current period and to make forecasts for the short-term long-term perspective. In this regard, a number of existing types of models of population migration were considered and...","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74308226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Stanislav Bozhikov, Karina Mitarova, Filippa Vassileva, Bilyana Tacheva, B. Paarvanova, M. Karabaliev
The aim of the study is to investigate and compare gamma index (γ) results obtained from the Trajectory log (TL) file of linear accelerator (Linac) to γ results obtained by Portal Dosimetry (PD) measurements. The Treatment planning system Eclipse was used to change the Dosimetric Leaf Gap (DLG) in order to study its influence on γ. In this paper, we used the python script API Pylinac (v.2.2.6) to analyze the TL file which stores the performance parameter data of the Linac for radiotherapy, in our case Varian True Beam STX. The results for the gamma passing rate (%GP) obtained from TL tend to be higher from those obtained by PD. We found that the values of %GP obtained by the two methods become comparable when the dose difference criterion used for TL data is 8 to 10 times smaller than the same criterion used with PD data. The methodology described here would allow a verification of the gamma analysis results by using the python script API Pylinac. This could make the verication of the plan before the treatment process more precise and reliable.The aim of the study is to investigate and compare gamma index (γ) results obtained from the Trajectory log (TL) file of linear accelerator (Linac) to γ results obtained by Portal Dosimetry (PD) measurements. The Treatment planning system Eclipse was used to change the Dosimetric Leaf Gap (DLG) in order to study its influence on γ. In this paper, we used the python script API Pylinac (v.2.2.6) to analyze the TL file which stores the performance parameter data of the Linac for radiotherapy, in our case Varian True Beam STX. The results for the gamma passing rate (%GP) obtained from TL tend to be higher from those obtained by PD. We found that the values of %GP obtained by the two methods become comparable when the dose difference criterion used for TL data is 8 to 10 times smaller than the same criterion used with PD data. The methodology described here would allow a verification of the gamma analysis results by using the python script API Pylinac. This could make the verication of the plan before the trea...
{"title":"Determination of the sensitivity of trajectory log files gamma analysis - A method based on python scripts","authors":"Stanislav Bozhikov, Karina Mitarova, Filippa Vassileva, Bilyana Tacheva, B. Paarvanova, M. Karabaliev","doi":"10.1063/1.5138023","DOIUrl":"https://doi.org/10.1063/1.5138023","url":null,"abstract":"The aim of the study is to investigate and compare gamma index (γ) results obtained from the Trajectory log (TL) file of linear accelerator (Linac) to γ results obtained by Portal Dosimetry (PD) measurements. The Treatment planning system Eclipse was used to change the Dosimetric Leaf Gap (DLG) in order to study its influence on γ. In this paper, we used the python script API Pylinac (v.2.2.6) to analyze the TL file which stores the performance parameter data of the Linac for radiotherapy, in our case Varian True Beam STX. The results for the gamma passing rate (%GP) obtained from TL tend to be higher from those obtained by PD. We found that the values of %GP obtained by the two methods become comparable when the dose difference criterion used for TL data is 8 to 10 times smaller than the same criterion used with PD data. The methodology described here would allow a verification of the gamma analysis results by using the python script API Pylinac. This could make the verication of the plan before the treatment process more precise and reliable.The aim of the study is to investigate and compare gamma index (γ) results obtained from the Trajectory log (TL) file of linear accelerator (Linac) to γ results obtained by Portal Dosimetry (PD) measurements. The Treatment planning system Eclipse was used to change the Dosimetric Leaf Gap (DLG) in order to study its influence on γ. In this paper, we used the python script API Pylinac (v.2.2.6) to analyze the TL file which stores the performance parameter data of the Linac for radiotherapy, in our case Varian True Beam STX. The results for the gamma passing rate (%GP) obtained from TL tend to be higher from those obtained by PD. We found that the values of %GP obtained by the two methods become comparable when the dose difference criterion used for TL data is 8 to 10 times smaller than the same criterion used with PD data. The methodology described here would allow a verification of the gamma analysis results by using the python script API Pylinac. This could make the verication of the plan before the trea...","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"18 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74645186","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
G. Tesoriere, A. Canale, A. Severino, I. Mrak, T. Campisi
Generally the safety of public areas plays a fundamental role in the liveability of a city. Different evacuation simulations are carried out over the years in order to mitigate the problems connected to a chaotic movement of pedestrians. The panicgenerated by a possible risky event, often involves variations in the trajectories assumed in the same spaces in safe conditions. This is due to the variations in speed, pedestrian density in the sub-areas and if not properly evaluated, the evacuation process could generate crowds and therefore congestion, reducing the distance from the area object of an event. The present study focuses on the evaluation of different scenarios applied to the named square of Kalamaria (Greece) which is located near the two biggest pedestrian areas of the city. The study approach, based on pedestrian micro-simulation, is focused on the dynamic assignment,implemented in order to shape the path pedestrian choice behaviour by omitting the creation of static routes and using the OD matrix as flow input instead. Different steps are established in order to enquire input data, to calibrate the tool and obtain the results. These are based on the definition of areas and sub-areas in accordance with the pedestrian social force model.Through dynamic pedestrian assignment, different parameters were compared including speeds, density pedestrian and the LOS (Level Of Service), crossing the main square which may lead to benefits or criticalities as the risk level increases.Generally the safety of public areas plays a fundamental role in the liveability of a city. Different evacuation simulations are carried out over the years in order to mitigate the problems connected to a chaotic movement of pedestrians. The panicgenerated by a possible risky event, often involves variations in the trajectories assumed in the same spaces in safe conditions. This is due to the variations in speed, pedestrian density in the sub-areas and if not properly evaluated, the evacuation process could generate crowds and therefore congestion, reducing the distance from the area object of an event. The present study focuses on the evaluation of different scenarios applied to the named square of Kalamaria (Greece) which is located near the two biggest pedestrian areas of the city. The study approach, based on pedestrian micro-simulation, is focused on the dynamic assignment,implemented in order to shape the path pedestrian choice behaviour by omitting the creation of static routes and using the OD mat...
{"title":"The management of pedestrian emergency through dynamic assignment: Some consideration about the “Refugee Hellenism” Square of Kalamaria (Greece)","authors":"G. Tesoriere, A. Canale, A. Severino, I. Mrak, T. Campisi","doi":"10.1063/1.5138072","DOIUrl":"https://doi.org/10.1063/1.5138072","url":null,"abstract":"Generally the safety of public areas plays a fundamental role in the liveability of a city. Different evacuation simulations are carried out over the years in order to mitigate the problems connected to a chaotic movement of pedestrians. The panicgenerated by a possible risky event, often involves variations in the trajectories assumed in the same spaces in safe conditions. This is due to the variations in speed, pedestrian density in the sub-areas and if not properly evaluated, the evacuation process could generate crowds and therefore congestion, reducing the distance from the area object of an event. The present study focuses on the evaluation of different scenarios applied to the named square of Kalamaria (Greece) which is located near the two biggest pedestrian areas of the city. The study approach, based on pedestrian micro-simulation, is focused on the dynamic assignment,implemented in order to shape the path pedestrian choice behaviour by omitting the creation of static routes and using the OD matrix as flow input instead. Different steps are established in order to enquire input data, to calibrate the tool and obtain the results. These are based on the definition of areas and sub-areas in accordance with the pedestrian social force model.Through dynamic pedestrian assignment, different parameters were compared including speeds, density pedestrian and the LOS (Level Of Service), crossing the main square which may lead to benefits or criticalities as the risk level increases.Generally the safety of public areas plays a fundamental role in the liveability of a city. Different evacuation simulations are carried out over the years in order to mitigate the problems connected to a chaotic movement of pedestrians. The panicgenerated by a possible risky event, often involves variations in the trajectories assumed in the same spaces in safe conditions. This is due to the variations in speed, pedestrian density in the sub-areas and if not properly evaluated, the evacuation process could generate crowds and therefore congestion, reducing the distance from the area object of an event. The present study focuses on the evaluation of different scenarios applied to the named square of Kalamaria (Greece) which is located near the two biggest pedestrian areas of the city. The study approach, based on pedestrian micro-simulation, is focused on the dynamic assignment,implemented in order to shape the path pedestrian choice behaviour by omitting the creation of static routes and using the OD mat...","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"49 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78625474","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Eye-tracking, i.e. the measurement of eye activity as a technology is used in many different areas. The most useful is for example using an eye-tracker as a tool for controlling a computer, as a diagnostic tool, as well as a tool for scientific research in many different subjects (marketing, education, medicine, and so on). Our experiences with using eye-tracker technology for research into the effectiveness of learning materials and learning outcomes will be described in the paper.Eye-tracking, i.e. the measurement of eye activity as a technology is used in many different areas. The most useful is for example using an eye-tracker as a tool for controlling a computer, as a diagnostic tool, as well as a tool for scientific research in many different subjects (marketing, education, medicine, and so on). Our experiences with using eye-tracker technology for research into the effectiveness of learning materials and learning outcomes will be described in the paper.
{"title":"Eye-tracker technology in didactic research","authors":"Zuzana Václavíková","doi":"10.1063/1.5137973","DOIUrl":"https://doi.org/10.1063/1.5137973","url":null,"abstract":"Eye-tracking, i.e. the measurement of eye activity as a technology is used in many different areas. The most useful is for example using an eye-tracker as a tool for controlling a computer, as a diagnostic tool, as well as a tool for scientific research in many different subjects (marketing, education, medicine, and so on). Our experiences with using eye-tracker technology for research into the effectiveness of learning materials and learning outcomes will be described in the paper.Eye-tracking, i.e. the measurement of eye activity as a technology is used in many different areas. The most useful is for example using an eye-tracker as a tool for controlling a computer, as a diagnostic tool, as well as a tool for scientific research in many different subjects (marketing, education, medicine, and so on). Our experiences with using eye-tracker technology for research into the effectiveness of learning materials and learning outcomes will be described in the paper.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"15 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79747657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Functorial models of category theory are powerful tools used in many branches of mathematics, even in various computer languages such as Python, however, on an applied mathematics level, functors can also provide novel approaches and new types of systematizations of interrelations among scientific concepts and representations. In a somewhat simplified way, a functor can be thought of as a mathematical tool doing two things all at once: transforming both sets and mappings between those sets. For example, a functor can establish a connection between one entity, involving two sets and a family of transformations between them, and another entity, also involving some two sets and the family of transformations between those. In other words, such a functor transforms one pair of sets and the relations between them to another pair of sets and the relations between them.Functorial models of category theory are powerful tools used in many branches of mathematics, even in various computer languages such as Python, however, on an applied mathematics level, functors can also provide novel approaches and new types of systematizations of interrelations among scientific concepts and representations. In a somewhat simplified way, a functor can be thought of as a mathematical tool doing two things all at once: transforming both sets and mappings between those sets. For example, a functor can establish a connection between one entity, involving two sets and a family of transformations between them, and another entity, also involving some two sets and the family of transformations between those. In other words, such a functor transforms one pair of sets and the relations between them to another pair of sets and the relations between them.
{"title":"A functorial approach to analogous molecular systems","authors":"P. Mezey","doi":"10.1063/1.5137911","DOIUrl":"https://doi.org/10.1063/1.5137911","url":null,"abstract":"Functorial models of category theory are powerful tools used in many branches of mathematics, even in various computer languages such as Python, however, on an applied mathematics level, functors can also provide novel approaches and new types of systematizations of interrelations among scientific concepts and representations. In a somewhat simplified way, a functor can be thought of as a mathematical tool doing two things all at once: transforming both sets and mappings between those sets. For example, a functor can establish a connection between one entity, involving two sets and a family of transformations between them, and another entity, also involving some two sets and the family of transformations between those. In other words, such a functor transforms one pair of sets and the relations between them to another pair of sets and the relations between them.Functorial models of category theory are powerful tools used in many branches of mathematics, even in various computer languages such as Python, however, on an applied mathematics level, functors can also provide novel approaches and new types of systematizations of interrelations among scientific concepts and representations. In a somewhat simplified way, a functor can be thought of as a mathematical tool doing two things all at once: transforming both sets and mappings between those sets. For example, a functor can establish a connection between one entity, involving two sets and a family of transformations between them, and another entity, also involving some two sets and the family of transformations between those. In other words, such a functor transforms one pair of sets and the relations between them to another pair of sets and the relations between them.","PeriodicalId":20565,"journal":{"name":"PROCEEDINGS OF THE INTERNATIONAL CONFERENCE OF COMPUTATIONAL METHODS IN SCIENCES AND ENGINEERING 2019 (ICCMSE-2019)","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2019-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87610181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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